Fraxinus uhdei, commonly known as Tropical Ash or Shamel Ash, is a deciduous tree native to the riparian zones and moist forests of Mexico and Central America. It can reach a height of 50-80 feet and a width of 20-35 feet. The tree is characterized by its large, pinnately compound leaves and a rounded canopy. It produces inconspicuous flowers, with male and female flowers on separate trees (dioecious). The flowers are followed by samaras, which are a type of winged fruit. In its native habitat, Tropical Ash is an important component of riverine ecosystems, providing habitat for various wildlife species.

Tropical Ash is valued for its rapid growth and adaptability to urban environments, making it a popular choice for street trees in warmer regions, including Mexico and the southwestern United States. It has a high tolerance for air pollution and is often used to provide quick shade due to its fast-growing nature. However, its aggressive root system can damage sidewalks and other infrastructure. In cultivation, it requires full sun and does well with moderate water, preferring soils with good drainage. While it is not known for a particular susceptibility to diseases, it can be prone to ash borer insects. Due to its invasive potential, caution is advised when planting it outside its native range, as it can outcompete native vegetation and disrupt local ecosystems, as has happened in Hawaii.CC BY-SA 4.0